from rest_framework.response import Response
from rest_framework.views import exception_handler
from django.db import DatabaseError
from rest_framework import status
import logging

logger = logging.getLogger("django")


def custom_exception_handler(exc, context):
    """
    自定义异常处理
    :param exc: 异常类
    :param context: 抛出异常的上下文
    :return: Response相应对象
    """
    # 调用drf框架原生的异步处理方式
    response = exception_handler(exc, context)

    if response is None:
        if isinstance(exc, DatabaseError):
            view = context["view"]
            # 数据库异常
            logger.error('[%s] %s' % (view, exc))
            response = Response("服务器存储内部错误", status=status.HTTP_507_INSUFFICIENT_STORAGE)

    return response
